Question

Using factor theorem show that(x-1) is a factor of 4x cube -6x square+9x-7

Answer 1

x-1=0
x=1
if f(x)=4xcube-6xsq+9x-7
then f(1)=4*1cube-6*1sq+9*1-7
=4-6+9-7
=13-13
=0